“…Two ways to measure preference stability are to evaluate shifts in preference over time with Spearman rank‐order correlation coefficients (Spearman's ) or Pearson correlation coefficients (Pearson's ), which range on a scale from the critical r value of −1 (perfect negative correlation) to the critical r value of 1 (perfect positive correlation). Previous research on preference stability has defined stability for both the Spearman's and Pearson's as meeting or exceeding the critical r value of .58 (Hanley et al, 2006; Kelley et al, 2016; MacNaul et al, 2021), or meeting or exceeding the critical r value of .60 (Butler & Graff, 2021; Morris & Vollmer, 2020; Verriden & Roscoe, 2016). Although researchers often report stability in preference across preference assessment administrations (Hanley et al, 2006; Kelley et al, 2016), more recently published studies show these patterns of stability are idiosyncratic across participants (Butler & Graff, 2021; Morris & Vollmer, 2020).…”